Middle Ordovician (Chazy Group) cavity-dwelling boring sponges
Middle Ordovician (Chazy Group) cavity-dwelling boring sponges
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中奥陶统（Chazy群）空洞钻孔海绵
DOI：
10.1139/e81-105
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发表时间：
1981
影响因子：
1.4
通讯作者：
D. R. Kobluk
中科院分区：
文献类型：
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作者：
D. R. Kobluk
在魁北克蒙特利尔附近的拉瓦尔组（查齐群）中奥陶纪下部苔藓虫土丘中的微腔含有石内（钻孔）海绵存在的证据。枝状钻孔，具有类似于内石器时代海绵画廊的扇形壁和盾状体，类似于现代海绵碎片的多面碳酸盐颗粒，以及在洞穴壁或顶部和沉积物中原位存在的硅质骨针，所有这些都表明，在墙壁和屋顶的坚硬基底中存在着石内海绵的活动。（洞穴居住）因此，在中奥陶世，石内海绵在骨骼土丘和珊瑚礁的洞穴中大量繁殖，似乎在后生动物出现后不久就利用了洞穴栖息地。奥陶纪的骨骼礁
Microcavities in lower Middle Ordovician bryozoan mounds from the Laval Formation (Chazy Group) near Montreal, Quebec contain evidence that endolithic (boring) sponges were present. Ramose borings with scalloped walls and swellings resembling endolithic sponge galleries, faceted carbonate grains similar to modern sponge chips, and siliceous spicules both in situ on the cavity wall or roof and in the sediment, all point to the activities of endolithic sponges in the hard substrate of the wall and roof.Coelobiontic (cavity-dwelling) endolithic sponges therefore infested cavities in skeletal mounds and reefs in the Middle Ordovician and appear to have exploited the cavity habitat very soon after the appearance of metazoan skeletal reefs in the Ordovician.